Shoe strap punch



June 12, 1934. J. SENIK ET AL SHOE STRAP PUNCH Filed June 23, 1952 2 Sheets-Sheet 1 FIG.1.

June 12, 1934. J. SENIK ET AL SHOE STRAP PUNCH 2 Sheets-Sheet 2 Filed June 23, 1932 Patented June 12, 1934 UNITED STATES PATENT? OFFICE SHOE STRAP PUNCH Application June 23, 1932, Serial No. 618,930

8 Claims.

This invention relates to strap punches and with regard to certain more specific features to a punch for predeterminately placing a plurality of holes in shoe straps and the like.

' Among the several objects of the invention may be noted the provision of a strap punch which has means adapted to punch a plurality of holes at one stroke, said punch having means for varying the number of the punch holes and the location thereof with respect to the lengths of the strap and width thereof; the provision of apparatus of the class described having a cooperating readily renewable and movable punch plate; and the provision of apparatus of this class which is relatively simple and fool-proof in operation. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which is illustrated one of various possible embodiments of the invention,

Fig. 1 is a side elevation;

Fig. 2 is a front elevation;

Fig. 3 is a cross section taken on line 33 of .Fig. 2, showing in dash lines a blank adapted to .be punched; and, r

Fig. 4 is a perspective view of a punch removed from its socket.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring now more particularly to Fig. 1, there is illustrated at numeral 1 a punch frame having an overhanging head 3 carrying a drive shaft 5 for reciprocating a punch head 7, reciprocation being eifected at a crank-pin articulation 8 in known manner. A driving pulley 9 on shaft 5 is driven by a belt 11 and normally runs freely on said shaft but upon depressing a pedal 13, a one-revolution clutch 15 causes a connection between the pulley 9 and the shaft 5 for one revolution. Clutches of this class are known and this description will not be burdened with further details thereof. The pedal 13 is connected to the clutch by a linkage 14 returnable by a spring 16. From the above, it will be seen that upon depressing the pedal 13 with the foot that one reciprocation of the die head 7 is obtained.

The C-frame of the punch has an upper head 3 and a lower bed 17. This bed 17 also carries an extension 19 which reciprocally supports a gudgeon 21 to which is fastened a work plate 23, the latter being slidable vertically but being normaly prevented from rotation by a key 25. Upon temporary removal of the key 25'from its recess in frame 1, the work plate 23 may be temporarily rotated for adjusting purposes.

A jack 27 having a knurled head 29, a handle 31 and screw 33 permits adjustment of the plate 23 upon said temporary removal of the key 25.

When the key 25 is replaced as shown in Figs.

1 and 3, the plate 23 may be moved up and down to an upward or lower position by a ninety degree throw of the handle 31 which causes cooperation between sloping lifting surfaces 35. This cooperation causes a raising of the jack 2'7 with the screw 33 and the gudgeon 21 into which said screw 33 is threaded, thereby also giving a corresponding movement to the'plate '23. It will be understood that the jack 2'? has a suitable rotating bearing 3'7 in the lower extension 1'7 of the frame 1. A spring-pressed brake 39 pressing against the knurled head 29 serves as a detent to hold the jack in a predetermined position.

The above features are known and the invention herein comprises improvements in the plate 23 and punch parts. There is provided punch plate or strip 40 of copper or the like, surrounded by rectangular yokes 41, said yokes having 35 threaded extensions 43 for application of wing nuts 45 which press against washers 47. The screws 43 pass loosely through openings 51 per-' mitting lateral adjustments when the wing nuts 45 are loose. This construction permits of pulling down the strip 40 against the plate 23 and looking it in any one of a number of longitudinal adjustments and also permits lateral and longitudinal adjustments thereof. Thus parallel movement of the strip 40 on the plate 23 is rendered universal.

As shown, the screws 43 and yokes 41 pass through the slots 51, and when the wing nuts 45 are loosened permit not only parallel longitudinal adjustmentof the plate 40 but also parallel sideward adjustment thereof. In order to render the clamping action effective, it will be understood that the washers 47 are wider than the slots 51, as shown.

Inasmuch as the strip or plate 40 forms the base for punching operations of a plurality of punches, it will be seen that the parallel adjustment movement adapted to be effected on the strip 40 ensures that after one region on the strip 40 has been worn beyond use because of repeated con- 110 cussion of the punch, and an adjustment is made for bringing up an unused portion for cooperation with the punches which will be described, that all of the parts of cooperation with the punches have been renewed. This soft plate feature is also known.

Laterally located with respect to the strip 40 is a second strip 53 having an oiTset 55, providing an extension 57 for cooperation with the upper surface of the movable strip 40. Extending laterally from the strip 53 and parallel to the strip 40, is a guide tab 59 having indicia 61 cut or otherwise formed thereon. The tab 59 is offset as shown at numeral 63, to provide an extension 65. A slot and pin combination 67 guide the movement of the strip 53 so that said movement is linear and a wing nut 66 and slot 68 provide means for clamping down the strip 53 in any one of a number of predetermined positions laterally of the strip 40.

'The punching is efiected by a punch head or die 69 provided at the bottom of the ram '7 and having a plurality of tubular punches 71. It will be apparent that the number of punches '71 may be varied by replacing the die 69 with a different die having a difierent number of said punches. Slugs obtained by use of the punches pass up the hollow centers of the same to a lateral outlet opening '72. The lateral opening 72 is in the form of a trough in which gather the slugs which pass up the punches '71. After the trough 72 is filled, the operator may run a rod or the like through it to clear it. To accommodate the rod, the trough '72-passes under the shank '76 by means of which the head is fitted to a socket 74 in the head '7, a set screw 8 being used for fastening purposes. The advantage of the trough is that it gathers slugs for a substantial period of time to prevent them from scattering over. the plate.

Operation is as follows:

Adjustments from the plate 23 are made while it is in its lower position such as shown in solid lines in the drawings. The plate 23 may be raised into working position by turning the handle '31 so that the surfaces 35 engage thus causing a rise. The detent 39 maintains the raised position. An exemplary raised position is shown in, dotted lines at numeral 73 in Fig. 1. I

A blank such as shown at numeral 75 having a strap '77 is arrangedv on the plate 23, as shown, with the tip 79 of the strap 77 placed at the proper indicator 61 so as to place the first punch hole at the point. predeterminately decided upon. Thus the first hole may be at any one of three 10- cations in the example.

The strap '77 is abutted against the guide extension 65 which has theretofore been adjusted so that said abutment will place the punch holes on center line or any other predetermined location with respect to the edges of the strap '77.

Next, the pedal 13 is depressed whereupon one revolution of the shaft 5 will cause one punching reciprocation of the ram '7. This causes the punches 71 to pass through the leather or like of the strap 77, thus cutting the holes shown at must be moved so that a new working surface is presented to the punches. This may be done by loosening the wing nut 45 and adjusting the strip 40 laterally and/or longitudinally without interfering with the adjustments for positioning the blanks. It will be seen that this adjustment does not affect the predetermined guiding adjustment which has been made on the strip 53, because the strip 40 moves thereunder.

It will be seen that the die head 69 may have another substituted therefor having a different number of punches such as, say, 2, 3 or 5, and a corresponding change made in bringing the point 79 of the strap 7'7 opposite. the proper. one of the indicia 61.

In view of the above, it will be seen that the several objects of the invention are. achieved and other advantageous results attained.

,As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it is intended that allmatter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. A punch comprising a supporting plate, a relatively soft punch plate adapted to be adjustably held thereon, and a guide member adapted to be adjustably held to said supporting plate,

said guide member having an abutment for determining lateral placement of a piece to be worked upon and. indicia for determining the longitudinal position of said piece, said punch plate being independently adjustable relatively with respect to a given adjustment of the guide memben 2. A punch comprising a supporting plate, a punch plate, adapted to be adjustably held thereon, and a guide member adapted to be adjustably held to said supporting plate and associated with said punch plate, said guide member having an abutment for lateral adjustment of a piece to be worked upon, said punch plate being'independently adjustable relatively with respect to a given adjustment. of the guide member.

3. A punch comprising a supporting plate, a strip supportedon said plate, said strip being adjustably held for longitudinal and lateral movement and an adjustable-abutment associated with and above said strip, said abutment having indicia juxtaposed along the longitudinal direction of said strip. v H

7 JOHN SENIK.

HERMAN MORANVILLE. 140 

